You can issue an FS5 either from the main Payroll page or from the payroll from which you wish to generate the FS5.
Issuing an FS5 from payrolls
Go to the payroll that you wish to issue the FS5 for, make sure the roll is finalized and click the FS5 button at the bottom right side of the screen.
How to Fix a mis-match in a FS5
A mismatch in a previous FS5 happens when the payroll calculation is changed after the FS5 has been generated. To fix the mismatch. simply re-generate the FS5 for that month.